Disable flaky BrowserWindowFullScreenControllerTest.TestFullscreen.

See
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_swarming/builds/6196
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_swarming/builds/6151
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_swarming/builds/6056

BUG=53586
TBR=avi@chromium.org

Review URL: https://codereview.chromium.org/493783003

Cr-Commit-Position: refs/heads/master@{#291557}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@291557 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/cocoa/browser_window_controller_unittest.mm

@@ -828,7 +828,8 @@ void WaitForFullScreenTransition() {
   observer.Wait();
 }
 
-TEST_F(BrowserWindowFullScreenControllerTest, TestFullscreen) {
+// http://crbug.com/53586
+TEST_F(BrowserWindowFullScreenControllerTest, DISABLED_TestFullscreen) {
   [controller_ showWindow:nil];
   EXPECT_FALSE([controller_ isFullscreen]);